Incorrect. Republicans have successfully branded themselves as gun advocates, and Democrats as anti-gun. There are as many liberal gun owners as conservatives. Liberals just don't jerk off with their guns on social media.
https://news.gallup.com/poll/21496/gun-ownership-higher-amon...
But this is way too reductive. There's lots of gun ownership in the US across all political affiliations. Additionally, gun ownership is independent of someone's views on guns. I know people with liberal views on gun ownership who don't own guns and people with restrictive views on gun ownership who do own guns.